S.C. Code § 44-53-577
Section 44-53-160(B) authorizes the Department of Health and Environmental Control to add, delete, or reschedule a substance as a controlled substance when the General Assembly is not in session, and Section 44-53-160(C) requires the department to make such changes to conform to federal law. For a complete and accurate list of controlled substance schedules, please visit the department's website at http://www.scdhec.gov/Health/FHPF/DrugControlRegisterVerify/ControlledSubstanceSchedule/